Question

Which of the following correctly lists the three chief factors of evolution identified by Darwin?

Options

• Variations, adaptation, and speciation

• Natural selection, heredity, and adaptation

• Mutations, migration, and genetic drift

• Variations, struggle for existence, and heredity

Answer 1

Darwin stated that although natural selection may seem simple, its operation is highly complex. He identified three chief factors of evolution: (1) Variations, (2) Struggle for existence, and (3) Heredity.